Syzygy endgame tablebases

Black is losing with DTZ 104

This is a blessed loss. Mate can be forced, but a draw can be achieved under the fifty-move rule.

KBNNNvKB.pgn lichess.org

Histogram: KBNNN winning vs. KB (log scale)

Longest KBNNNvKB phases

KBNNNvKB statistics (unique positions)

White wins:
532,737,781,503 (97.8%)
Frustrated white wins:
37,282,443 (0.0%)
Draws:
11,872,983,042 (2.2%)
Black wins:
7,427,376 (0.0%)
KBNNNvKB.json (?)